[IGSREPORT-9825] Wk 1194 IGS SINEX Combination
Remi Ferland
ferland at geod.nrcan.gc.ca
Thu Dec 12 14:39:14 PST 2002
******************************************************************************
IGS Electronic Report 12 Dec 14:39:24 PST 2002 Message Number 9825
******************************************************************************
Author: R. Ferland , D. Hutchison
===================================================================
Combined AC solution for GPS week 1194 - 02/11/24 to 02/11/30
===================================================================
1) Contacts:
============
e-mail: ferland at geod.nrcan.gc.ca
Tel: (613)995-4002 (Remi Ferland)
Fax: (613)995-3215
2) Products:
============
All products are available at cddisa.gsfc.nasa.gov
igs02P1194.snx Combined weekly solution.
igs02P1194.erp Daily Earth Rotation Parameters.
igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013.
IGS02P48.snx Cumulative Combined solution.
igs02P1194.sum This file.
igs02P1194.itr Residuals between the AC and the IGS00 for the RF stations.
igs02P1194.res Residuals between the AC and the Combined Weekly solution.
IGS02P48.res Residuals between the AC and the Cumulative Combined solution.
Where IGSyyPww & igsyyPwwww represent:
yy Last 2 digits of the year
ww week in year yy
wwww GPS week
P GPS technique used
3) Combination Strategy:
========================
The AC solutions are processed using the following procedure:
3-1) The AC solutions are checked/corrected for possible format problems,
station names inconsistencies, etc...
3-2) The AC solutions are unconstrained according to the information provided
in the SOLUTION/APRIORI Block.
3-3) The AC solutions are aligned (using a 7-parameters) and compared to the
IGS00 stations at the current epoch.
ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS01P37_RS54.SNX.Z
3-4) The AC are compared to IGS00, to each other, to the previous week
solution and to the cumulative solution in order to identify and remove
outliers.
3-5) The weekly AC solutions are combined and added to the cumulative
combined solution. The cumulative combination is done to ensures 14
parameters singularity.
The weekly combined solution is aligned to the IGS00 of the current
epoch using a 7-parameters transformation. The singular cumulative
combined solution is aligned to the IGS00 of the reference epoch
using a 14-parameters transformation and the 54 ITRF station positions
and velocities. The IGS00 is a realization of ITRF2000.
For more details, see:
Blewitt, G., C. Boucher and J. Kouba, 1997, Procedure for ITRF continuous
realization, the report of the IGS GB, presented to the IGS Governing
Board Meeting held in San Francisco, Dec. 11.
Kouba, J., J. Ray and M.M. Watkins, IGS Reference Frame Realization, 1998
IGS Analysis Center Workshop Proceedings, European Space Operations
Centre, Darmstadt, Germany.
The combination software was developed at NRCan.
4) Remarks:
===========
ITR = IGS01P37_RS54.SNX
igs = igs02P1194.snx
IGS = IGS02P48.snx
BuA = IERS Bulletin A
ncl are used to quality control the weekly combination.
gfz excluded from the geocenter estimation (Sec. 5-4).
4-1) Starting with GPS week 1143, the solutions are aligned to the
IGS01P37_RS54.SNX realization of ITRF2000.
4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
is included in the erp files.
5) Results:
===========
5-1) AC (Variance Factor)^0.5 estimates:
==================================================
The residuals used in the estimation of the Variance Factor
are the differences between the cumulative combined solution
and each AC weekly solution.
SF = (Variance Factor)^0.5 = (Chi^2/dof)^0.5
Final(SF) = Apriori(SF) * Aposteriori(SF)
Solution |# sta| #RF | Apriori(SF)|Aposteriori(SF)| Final(SF)|
---------------|-----|-----|---------------|---------------|---------------|
cod | 141 | 45 | 27.119 | 0.998 | 27.072 |
emr | 40 | 21 | 4.078 | 0.996 | 4.061 |
esa | 55 | 36 | 9.630 | 1.000 | 9.628 |
gfz | 147 | 44 | 14.123 | 0.998 | 14.093 |
jpl | 82 | 32 | 4.439 | 1.075 | 4.772 |
ngs | 74 | 46 | 23.898 | 0.999 | 23.865 |
sio | 126 | 46 | 2.086 | 0.999 | 2.084 |
ncl | 122 | 47 | 2.487 | 0.929 | 2.310 |
igs | 182 | 48 | 1.347 | 1.048 | 1.411 |
---------------|-----|-----|---------------|---------------|---------------|
5-2) Solution Residuals weighted Average & STD :
=====================================================
5-2-1) With respect to the IGS00 stations:
=============================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 44 | 0.5 0.3 -1.1 | 3.4 4.7 13.5 |
emr 20 | -1.5 -0.1 0.4 | 3.4 3.2 7.7 |
esa 35 | 0.6 0.6 0.5 | 5.5 6.4 13.6 |
gfz 43 | -0.9 0.4 -0.9 | 3.3 3.4 7.6 |
jpl 31 | -1.2 0.0 -0.3 | 3.5 3.6 8.9 |
ngs 45 | -2.9 1.1 0.7 | 3.7 5.0 8.8 |
sio 45 | -1.1 0.5 0.2 | 3.8 4.1 9.1 |
ncl 46 | -0.3 0.2 -0.1 | 3.1 3.2 5.8 |
---------------|---------------------------|---------------------------|
5-2-2) With respect to the Weekly Combination:
=================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 140 | 0.9 0.7 -0.9 | 1.9 2.5 9.3 |
emr 40 | -0.7 0.6 -0.2 | 2.1 2.3 7.0 |
esa 55 | 0.4 0.1 0.8 | 4.0 4.3 9.4 |
gfz 143 | -1.0 0.4 -1.6 | 1.2 1.3 5.3 |
jpl 82 | -0.9 0.3 0.9 | 1.7 1.8 6.5 |
ngs 73 | -2.3 1.1 0.6 | 2.3 4.8 7.5 |
sio 120 | -0.5 -0.3 1.7 | 1.9 2.9 7.2 |
ncl 121 | -0.2 0.0 0.2 | 0.5 0.6 1.7 |
ITR 47 | 0.3 -0.6 0.0 | 3.3 3.1 6.3 |
---------------|---------------------------|---------------------------|
5-2-3) With respect to the Cumulative Combination:
=====================================================
Solution | Weighted Average (mm) | STD (mm) |
| N E U | N E U |
---------------|---------------------------|---------------------------|
cod 128 | -0.1 0.3 -1.9 | 2.4 3.8 11.8 |
emr 39 | -1.7 0.2 0.2 | 2.3 2.4 7.9 |
esa 54 | -0.4 -0.1 0.2 | 4.8 5.0 10.8 |
gfz 120 | -2.1 0.0 -1.1 | 2.9 2.6 8.4 |
jpl 74 | -2.1 -0.3 0.5 | 2.8 3.1 8.6 |
ngs 74 | -3.4 0.7 0.6 | 3.6 6.1 9.5 |
sio 116 | -1.4 -0.3 1.1 | 3.5 4.6 8.9 |
ncl 115 | -1.1 -0.2 0.0 | 2.1 2.1 5.4 |
igs 149 | -1.0 -0.3 -0.2 | 2.1 2.5 6.1 |
ITR 54 | -0.3 -0.5 0.0 | 1.4 1.6 3.0 |
---------------|---------------------------|---------------------------|
5-3) 7-Parameters Transformation: AC ----> IGS01P37_RS54.snx
=================================================================
5-3-1) Estimates :
=====================
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | 0.004 0.002 -0.037 8.8 9.9 -11.8 1.48 |
emr | -0.027 -0.057 0.021 2.2 1.8 -4.9 0.88 |
esa | 0.023 -0.085 0.012 -3.1 12.2 4.2 0.92 |
gfz | -0.017 0.002 0.026 -1.2 0.8 -1.7 1.18 |
jpl | -0.006 -0.009 -0.026 8.3 6.4 -11.5 0.73 |
ngs | 0.058 0.069 -0.168 -10.0 6.8 8.8 1.51 |
sio | -0.038 0.108 -0.054 13.0 2.6 63.3 1.25 |
ncl | -0.024 -0.075 -0.034 1.9 -0.2 -3.3 1.02 |
---------------|---------------------------------------------------------------|
5-3-2) STD :
===============
Solution | R X R Y R Z T X T Y T Z SCL |
| (mas) (mas) (mas) (mm) (mm) (mm) (ppb) |
---------------|---------------------------------------------------------------|
cod | 0.059 0.061 0.067 1.5 1.5 1.5 0.24 |
emr | 0.086 0.084 0.102 2.2 2.3 2.2 0.35 |
esa | 0.068 0.070 0.076 1.8 1.8 1.8 0.28 |
gfz | 0.059 0.061 0.070 1.6 1.6 1.6 0.24 |
jpl | 0.073 0.071 0.081 1.8 1.8 1.8 0.29 |
ngs | 0.059 0.061 0.068 1.6 1.6 1.5 0.24 |
sio | 0.058 0.059 0.069 1.5 1.5 1.5 0.24 |
ncl | 0.058 0.059 0.068 1.5 1.5 1.5 0.24 |
---------------|---------------------------------------------------------------|
5-4) Geocenter:
====================
| X Y Z | s X s Y s Z |
| (mm) (mm) (mm) | (mm) (mm) (mm) |
---------------|---------------------------|---------------------------|
igs | -0.8 5.1 -0.2 | 2.3 1.6 4.4 |
---------------|---------------------------|---------------------------|
5-5) ERP Residuals Weighted Average & STD :
================================================
5-5-1) Weighted Average :
============================
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 15.0 2.4 --- 1.9 --- |
emr | --- -3.4 1.7 -6.3 1.3 -13.3 |
esa | --- 5.9 -16.5 --- -.5 --- |
gfz | --- -7.9 -.3 2.4 -2.7 1.8 |
jpl | --- 20.2 -2.1 -1.5 2.7 -1.7 |
ngs | --- -70.6 21.1 -40.3 6.1 10.4 |
sio | --- -9.9 12.1 -.5 1.7 10.3 |
ncl | --- 5.7 -3.0 --- 2.0 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 11.4 -14.9 -2.6 22.4 4.2 |
---------------|------------------------------------------------------------|
5-5-2) STD :
===============
Solution | UT LOD XPO XPOR YPO YPOR |
| us us .01mas .01ma/d .01mas .01ma/d |
---------------|------------------------------------------------------------|
cod | --- 7.2 .4 --- 1.7 --- |
emr | --- 8.3 3.7 14.5 2.6 16.3 |
esa | --- 12.5 6.1 --- 3.1 --- |
gfz | --- 2.9 2.5 8.5 3.2 11.3 |
jpl | --- 11.9 3.4 14.7 2.7 18.6 |
ngs | --- 34.0 7.7 43.9 14.1 57.9 |
sio | --- 5.9 2.5 12.7 3.2 7.3 |
ncl | --- 2.0 1.5 --- .9 --- |
ITR | --- --- --- --- --- --- |
BuA | --- 7.9 5.6 14.6 6.5 10.9 |
---------------|------------------------------------------------------------|
5-6) Outliers:
===================
Thresholds set at 5 sigmas and 50 mm.
Solution Solution | Station | N E U |
Minus |code id soln| (mm) (mm) (mm)|
-----------------------------------------|------------|-----------------------|
| | |
IGS01P37_RS54.snx esa11947.snx |CHAT A ----| -0.6 -6.1 -80.3|
| | |
IGS01P37_RS54.snx ngs11947.snx |MCM4 A ----| -5.9 3.0 -95.6|
| | |
IGS01P37_RS54.snx sio11947.snx |YAR1 A ----| -2.2 5.9 -30.4|
| | |
cod11947.snx jpl11947.snx |KELY B ----| 1.1 -2.6 -76.7|
cod11947.snx jpl11947.snx |SIMO A ----| 0.0 -8.1 -51.6|
| | |
cod11947.snx ngs11947.snx |BAKO A ----| -7.5 0.7 -74.3|
cod11947.snx ngs11947.snx |KOKB A 2| 17.9 26.6 57.5|
| | |
cod11947.snx sio11947.snx |WUHN A 2| 3.5 -3.5 50.5|
| | |
esa11947.snx ngs11947.snx |KOKB A 2| 27.8 25.1 81.3|
| | |
gfz11947.snx ngs11947.snx |BAKO A ----| 5.2 -5.9 -54.3|
gfz11947.snx ngs11947.snx |KOKB A 2| 23.9 26.8 75.4|
| | |
jpl11947.snx ngs11947.snx |KELY B ----| -5.9 -0.7 73.1|
| | |
jpl11947.snx sio11947.snx |KELY B ----| -1.6 2.2 64.0|
| | |
ngs11947.snx sio11947.snx |BAKO A ----| 6.9 2.9 70.7|
ngs11947.snx sio11947.snx |KOKB A 2| -16.8 -23.9 -58.0|
| | |
ngs11947.snx ncl1194g.snx |BAKO A ----| 0.0 3.2 68.3|
ngs11947.snx ncl1194g.snx |KOKB A 2| -20.2 -26.3 -64.9|
| | |
IGS02P47.snx cod11947.snx |HOLM A ----| 40.6 -22.2 285.8|
IGS02P47.snx cod11947.snx |MALD A ----| -55.1 111.2 -278.1|
| | |
IGS02P47.snx cod11947.snx |AREQ A 2| -17.7 -29.5 -4.9|
IGS02P47.snx cod11947.snx |HERS A ----| -0.6 14.9 -7.6|
| | |
IGS02P47.snx emr11947.snx |AREQ A 2| -19.4 -28.6 -14.4|
| | |
IGS02P47.snx emr11947.snx |KELY A ----| -5.1 1.9 50.3|
| | |
IGS02P47.snx gfz11947.snx |MALD A ----| -56.2 114.3 -275.7|
| | |
IGS02P47.snx gfz11947.snx |AREQ A 2| -22.1 -31.9 -7.2|
| | |
IGS02P47.snx gfz11947.snx |SIO3 A ----| -4.2 -1.5 -47.6|
| | |
IGS02P47.snx jpl11947.snx |MALD A ----| -60.1 120.5 -275.0|
| | |
IGS02P47.snx jpl11947.snx |AREQ A 2| -21.7 -31.8 -10.7|
| | |
IGS02P47.snx ncl1194g.snx |MALD A ----| -56.9 116.3 -274.5|
| | |
IGS02P47.snx ncl1194g.snx |AREQ A 2| -20.3 -31.8 -6.5|
| | |
IGS02P47.snx ncl1194g.snx |KELY A ----| -3.5 1.4 38.7|
| | |
IGS02P47.snx igs02P1194.snx |AREQ A 2| -17.8 -34.1 12.0|
-----------------------------------------|------------|-----------------------|
5-7) Conflicts:
====================
IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A
40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD A GOLD A
22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
13407S012 MADR A MADR A MAD2 A MADR A MADR A MADR A MADR A
MAD2 A
40114M001 NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A NRC1 A
NRC2 A
30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A
50103M108 TIDB A TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TID1 A
TID2 A TID1 A TIDB A TIDB A
TID2 A
50107M004 YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
MISSING IERS DOMES NOS AT gfz:
-----------------------------
BISH A PMON A PALM A
MISSING IERS DOMES NOS AT sio:
-----------------------------
CAVA A SFEL A VOLT A
IERS DOMES NO ncl IGS igs
============= ====== ====== ======
50103M108 TID2 A TIDB A TID1 A
TIDB A TIDB A
50107M004 YAR2 A YAR1 A YAR1 A
--
More information about the IGSREPORT
mailing list